Hello. I have a Tecumseh snow blower and it runs, but it sounds as if it is backfiring. If I slowly prime it while it is running, however, the problem gets better. I took the carburetor off and rebuilt it (took the welch plugs out, soaked in acid etc.), and it still does the same thing. The flywheel key is perfect, as well as the air gap for the magneto. What is the next step? Perhaps reseating the valves? Thank you for your help.

Have you tried adjusting the carb or it is one of those newer non adjustable ones?

Mine would backfire a little bit when I had it set too rich.

It is a non adjustable EPA crap carburetor. I tend to think it is running too lean because if I slowly prime it, the problem gets better, but maybe it is my imagination. I took the valves out last night they both look good. I'm going to reface the valves and see what happens. Thank you.

Save your time on the valves. If it starts OK, the valves are good. Locate the idle jet on the carb, it may be under a plastic plug. Remove it and clean the orifice on the end. Hopefully, that will solve your problem.

Keep in mind that a Tecumseh engine on a snowblower is not going to run like a Honda or Vanguard- they are noisy, tend to vibrate, and don't always run steadily, that's the nature of the beast.

Save your time on the valves. If it starts OK, the valves are good. Locate the idle jet on the carb, it may be under a plastic plug. Remove it and clean the orifice on the end. Hopefully, that will solve your problem.

Keep in mind that a Tecumseh engine on a snowblower is not going to run like a Honda or Vanguard- they are noisy, tend to vibrate, and don't always run steadily, that's the nature of the beast.

I checked the idle screw before I even rebuilt the carburetor and it was fine. I even checked the idle circuit etc. Maybe if I drill out the jet a little bit it might fix the problem??? These emissions carburetors are terrible...

Register Now

In order to be able to post messages on the MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

Log-in

User Name

Remember Me?

Password

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.